Re: kern/50060: kernel crash with i915drmksm on Intel 965Q

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR kern/50060; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: gnats-bugs%NetBSD.org@localhost, christos%NetBSD.org@localhost
Cc: 
Subject: Re: kern/50060: kernel crash with i915drmksm on Intel 965Q
Date: Sun, 11 Oct 2015 19:25:11 +0300

 I tried a -current kernel from source date 2015.10.10.19.35.15, which
 includes christos' recent commit of i915_dma.c 1.18, but it also
 paniced:
 
    pci0 at mainbus0 bus 0: configuration mode 1
    pchb0 at pci0 dev 0 function 0: vendor 8086 product 29a0 (rev. 0x02)
    agp0 at pchb0: i965-family chipset
    pci_mem_find: expected mem type 00000004, found 00000000
    pci_mem_find: expected mem type 00000004, found 00000000
    agp0: can't find MMIO registers
    ppb0 at pci0 dev 1 function 0: vendor 8086 product 29a1 (rev. 0x02)
    ppb0: PCI Express capability version 1 <Root Port of PCI-E Root Complex> x16 @ 2.5GT/s
    pci1 at ppb0 bus 1
    i915drmkms0 at pci0 dev 2 function 0: vendor 8086 product 29a2 (rev. 0x02)
    DRM error in i915_gmch_probe: failed to set up gmch
    uvm_fault(0xffffffff811b27a0, 0x7fc000357000, 2) -> e
    fatal page fault in supervisor mode
    trap type 6 code 2 rip ffffffff80a80c43 cs 8 rflags 10246 cr2 7fc000357000 ilevel 8 rsp ffffffff8137e7c8
    curlwp 0xffffffff8110d740 pid 0.1 lowest kstack 0xffffffff8137b2c0
    kernel: page fault trap, code=0
    Stopped in pid 0.1 (system) at  netbsd:_atomic_swap_64+0x3:     xchgq   %rax,0(%rdi)
    db{0}>
 
 -- 
 Andreas Gustafsson, gson%gson.org@localhost